Book/Report

FZJ-2018-07047

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bestimmung der Aktivitäten von Komponenten ternärer Legierungen Al-Ni-M (M = Co, Fe, Hf) mit der Methode der Knudseneffusions-Massenspektrometrie

Albers, M. (Corresponding author)FZJ* ; Hilpert, K.FZJ* ; Nickel, H.FZJ* ; Weil, K. G.

1994
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/20305

Report No.: Juel-2974

Abstract: The vapour pressures of the components in ternary solid solutions of cobalt, hafnium or iron in AlNi$_{3}$ ($\gamma$'-phase) have been determined by Knudsen effusion mass spectrometry over the temperature range between 1304 and 1612 K. The chemical activities of the components were obtained for the compositions (AlNi$_{3}$)$_{1_x}$Hf$_{x}$ (x = 0 - 0.10), Al$_{0.25-x}$ Hf$_{x}$Ni$_{0.75}$ (x = 0.02 - 0.10), (AlNi$_{3}$)$_{1_x}$Fe$_{x}$ (x = 0 - 0.08) and (AlNi$_{3}$)$_{1_x}$Co$_{x}$ (x = 0 - 0.15) from the corresponding vapour pressures. In addition the chemical activities of aluminium and nickel in the systems Al-Ni-M (M = Co, Fe) have been determined by applying the ion intensity ratio method. Partial enthalpies and partial entropies of mixing of the components were obtained in the two latter ternary systems evaluating the temperature dependence of the chemical activities and the temperature dependence of the partial free enthalpies of mixing. The influence of a site preference of cobalt and iron in AlNi$_{3}$ on the concentration dependence of the partial mixing functions was discussed using a sublattice model. High temperature differential thermal analysis and investigation of annealed and quenched alloys yielded vertical sections for the compositions (AlNi$_{3}$)$_{1_x}$Hf$_{x}$ and Al$_{0.25-x}$ Hf$_{x}$Ni$_{0.75}$ (x = 0 - 0.10) and two isothermal sections at 1473 K for the systems Al-Ni-M (M = Co, Fe) in the region of the $\gamma$'-phase.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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